Ru oxide/carbon nanotube composites for supercapacitors prepared by spontaneous reduction of Ru(VI) and Ru(VII)

被引：55

作者：

Liu, Xiaorong ^{[1
]}

Huber, Trisha A. ^{[2
]}

Kopac, Michael C. ^{[2
]}

Pickup, Peter G. ^{[1
]}

机构：

[1] Mem Univ Newfoundland, Dept Chem, St John, NF A1B 3X7, Canada

[2] CFB Esquimalt, Dockyard Lab Pacific, Def Res & Dev Canada Atlantic, Victoria, BC V9A 7N2, Canada

来源：

ELECTROCHIMICA ACTA | 2009年 / 54卷 / 27期

基金：

加拿大自然科学与工程研究理事会;

关键词：

Carbon nanotubes; Ruthenium oxide; Supercapacitor; Impedance; Specific capacitance; HYDROUS RUTHENIUM OXIDE; CARBON NANOTUBES; ELECTRODE MATERIAL; MANGANESE OXIDE; HIGH-POWER; PERFORMANCE; NANOPARTICLES; BEHAVIOR; ENERGY;

D O I：

10.1016/j.electacta.2009.07.044

中图分类号：

O646 [电化学、电解、磁化学];

学科分类号：

081704 ;

摘要：

A novel method based on spontaneous reduction of Ru(VI) and Ru(VII) is reported for the deposition of Ru oxide on multi-walled carbon nanotubes (MWCNT). Both purified and acid functionalized nanotubes (p-MWCNT and a-MWCNT) have been used to produce composite materials for use in high power aqueous supercapacitors. Specific capacitances of 213 +/- 16 Fg(-1) and 184 +/- 11 Fg(-1) were obtained for Ru oxide/p-MWCNT and Ru oxide/a-MWCNT composites, respectively. Specific capacitances for the Ru oxide component were 704 +/- 62 Fg(-1) and 803 +/- 72Fg(-1), respectively. Current vs. potential curves exhibited capacitance peaks at ca. +0.5V vs. Ag/AgCl. The Ru oxide/p-MWCNT composite was shown to be stable over 20,000 charge/discharge cycles. An advantage of the method is that no pre-treatment of the MWCNT is required for optimum performance. Crown Copyright (C) 2009 Published by Elsevier Ltd. All rights reserved.

引用

页码：7141 / 7147

页数：7

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